PHP syntax

May 10, 2021 PHP

The PHP script executes on the server and then sends the HTML-only results back to the browser.

Basic PHP syntax

PHP scripts can be placed anywhere in the document.

The PHP script starts with .lt;?php and ends with ?::

<?php

PHP code
?>

The default file extension for PHP files is .php.

PHP files typically contain HTML tags and some PHP script code.

Below, we provide a simple example of a PHP file that outputs the text "Hello World!" to the browser. ：

<!DOCTYPE html>
<html>
<body>

<h1>My first PHP page</h1>

<?php
echo "Hello World!";
?>

</body>
</html>

Each line of code in PHP must end with a sign. A sign is a separator that distinguishes an instruction set.

With PHP, there are two basic instructions for output text in the browser: echo and print.

<! D OCTYPE html>
<html>
<body>

<?php
This is a PHP single-line comment

/*
This is
PHP multi-line
Comments
*/
?>

</body>
</html>